Telenet ITI Parameters Summary of Telenet ITI Parameters --------------------------------- Para- Para- meter Description (Default Value) meter Description (Default Value) ----- --------------------------- ----- --------------------------- 1 Line feed Insertion (0) 31+ Interrupt Character (0) 2 Network Message Display (0) 32 Automatic Hang-up (0) 3 Echo (1) 33+ Flush Output (0) 4 Echo Mask (163) 34 Transmit on Timers (1) 5 Transmit Mask (2) 35 Idle Timer (80) 6* Buffer Size (0) 36 Interval Timer (80) 7* Command Mask (127) 37 Network Usage Display (0) 8* Command Mask (3) 38 Carriage Return PAD (Variable) 9 Carriage Return PAD (Fixed) 39 Padding Options (1) 10 Linefeed Padding 40 Inset on Break (0) 11 Tab Padding 41 PAD-Terminal Flow Control (0) 12 Line Width 42 PAD-Terminal XON Character (17) 13 Page Length (0) 43 PAD-Terminal XOFF Character (19) 14 Line Folding (1) 44* Generat Break (INV) 15 Page Wait (0) 45* APP on Break (0) 16 Interrupt on Break (0) 46 Input Unlock Option (0) 17 Break Code (0) 47 Input Unlock Timer (0) 18 NVT Options (0) 48 Input Unlock Character (0) 19 Initial Keyboard State (0) 49 Output Lock Option (2) 20 Half/Full Duplex 50 Output Lock Timer (10) 21 Real Character Code 51 Output Lock Option (0) 22 Printer Style 53* Break Options (0) 23 Terminal Type 54 Terminal-PAD Flow Control (0) 24 Permanent Terminal (0) 55 Terminal-PAD XON Character (17) 25 Manual or Auto Connect (0) 56 Terminal-PAD XOFF Character (19) 26 Rate 57 Connection Mode (2) 27 Delete Character 58 Escape to Command Mode (1) 28 Cancel Character (18) 59* Flush Output on Break (0) 29 Display Character (18) 63 Eight-bit Transparency (1) 30+ Abort Output Character (0) 64+ Early ACK (0) Note: All Telenet Paramaters must follow the National Option Marker (Paramter 0, value '21' Hex) in PAD Messages. Parameters marked with "*" should not be used. Parameters marked with "+" should be used with caution. Telenet ITI Parameters Arranged by Functional Category ------------------------------------------------------ Para- Para- meter Description (Default Value) meter Description (Default Value) ----- --------------------------- ----- --------------------------- (CONNECTION MODE) (BREAK HANDLING) 57 Connection Mode (2) 16 Interrupt on Break (0) 58 Escape to Command Mode (1) 40 Inset on Break (0) 17 Break Code (0) (CALL ESTABLISHMENT & CLEARING) 44* Generat Break (INV) 25 Manual or Auto Connect (0) 45* APP on Break (0) 32 Automatic Hang-up (0) 59* Flush Output on Break (0) 53* Break OPtions (0) (COMMAND PREOTECTION) 7* Command Mask (127) (VIRTUAL TERMINAL DEVICE) 8* Command Mask (3) 39 Padding Options (1) 9 Carriage Return PAD (Fixed) (DEVICE DEPENDENT) 38 Carriage Return PAD (Variable) 24 Permanent Terminal (0) 10 Linefeed Padding 23 Terminal Type 11 Tab Padding 20 Half/Full Duplex 12 Line Width 21 Real Character Code 13 Page Length (0) 22 Printer Style 14 Line Folding (1) 26 Rate 15 Page Wait (9) 63 Eight-bit Transparency (1) 1 Linefeed Insertions (0) (TERMINAL DISPLAY) (VIRTUAL TERMINAL PROCESS) 3 Echo (1) 18 NVT Options (0) 4 Echo Mask (163) 27 Delete Character (127) 2 Network Message Display (0) 28 Cancel Character (24) 37 Network Usage Display (0) 29 Display Character (18) 31 Interrupt Character (0) (PACKET ASSEMBLY/DISASSEMBLY) 30 Abort Output Character (0) 6* Buffer Size (0) 33 Flush Output (0) 5 Transmit Mask (2) 34 Transmit on Timers (1) (2741 Terminal Support) 35 Idle Timer (80) 19 Initial Keyboard State (0) 36 Interval Timer (0) 46 Input Unlock Option (0) 64 Early ACK (0) 47 Input Unlock Timer (0) 48 Input Unlock Character (0) (FLOW CONTROL) 49 Output Lock Option (2) 41 PAD-Terminal Flow Control (0) 50 Output Lock Timer (10) 42 PAD-Terminal XON Character (17) 51 Output Lock Option (0) 43 PAD-Terminal XOFF Character (19) 54 Terminal-PAD Flow Control (0) 55 Terminal-PAD XON Character (17) 56 Terminal-PAD XOFF Character (19) Parameters marked with "*" should not be used. Para- meter Description ----- ----------- 1 Linefeed Insertion This parameter instructs the PAD to routinely insert a linefeed (LF) character into the data stream following each appearance of a carriage return (CR) character. Values may be OR-ed together: 0 No LF Insertion (TP4 Default) 1 Insert LF after CR on output to the terminal 2 Insert LF after CR on input from the terminal 4 Insert LF after CR on echo to the terminal 2 Network Message Display This parameter controls the transmission of network-oriented messages to the terminal. Values are: 0 Transmit network-oriented messages (Default) 1 Suppress network-oriented messages 3 Echo This specifies whether or not the network returns images of characters entered from the terminal during Data Transfer mode. Values are: 0 Network does not echo 1 Network echoes according to the Rcho Mask (Default) 3 Echo Mask The Echo Mask specifies which characters are to be echoed during Data Transfer mode. Values may be OR-ed together: 1 Alphanumerics 2 Carriage Return 4 Escape 8 Editing Characters 16 Terminators 32 Form Effectors 64 Control Characters 128 Other Characters Default is 163 = 1+2+32+128 (Alphanumerics, Carriage Return, Form Effectors, and Other Characters). 3 Transmit Mask The Transmit Mask specifies those characters which indicate a logical break in the data being entered from a terminal and which force transmission of that data to its destination. Values may be OR-ed together: 0 Transmission on Transmit Mask disabled 1 Alphanumerics 2 Carriage Return (Default) 4 Escape 8 Editing Characters 16 Terminators 32 Form Effectors 64 Control Characters 128 Other Characters 4 Buffer Size This parameter is archaic and should no longer have any affect on a TP. It is used to specify the maximum number of characters that will be accumulated by the network before they are forwarded to the Host. 0 Buffer 256 characters (Default) 1-255 Buffer 1-255 characters 7 Command Mask This is an archaic parameter. Its use has been phased out, but the parameter number has not be redefined for another function. 8 Command Mask This is an archaic parameter which has not been redefined to support another function. 9 Carriage Return Padding The Carriage Return Radding parameters specify the number of PAD chracter times to be inserted adter each carriage return character sent to the terminal. Parameter 9 specifies the Fixed Component. Values may run from 0 through 31 character-times of padding provided. 10 Linefeed Padding This specifies the number of pad character delays inserted after each linefeed (LF) character sent to the terminal. Values may range from 0 through 15 character-times of padding provided. 11 Tab Padding This specifies the number of pad character delays inserted after each horizontal tabulation (HT) character sent to the terminal. Values may range from 0 through 15 character-times of padding provided. 12 Line Width This identifies the number of character positions per terminal print line. Values range from 1 through 255 characters per line; or 0, which specifies 256 character per line. 13 Page Length This parameter identifies the number of lins per terminal page or displa screen. Values range from 1 throuhj 255 lines per page; or 0, which specifies an infinite page length. 14 Line Folding This parameter specifies whether or no the PAD begins a new line when the number of characters in a print line exceeds the line width: 0 Disable line folding 1 Enable line folding (Default) 15 Page Wait This parameter specifies whether or not the PAD automatically enters a flow controlled state (X-OFFed) at the end of each page. Page length is defined by Telenet parameter 13, above. 0 Page Wait disabled (Default) 1 Page Wait enabled 16 Interrupt on Break This parameter specifies whether or not the PAD will transmit an INTERRUPT packet to the Host when a break signal is received from the terminal. Values are: 0 No INTERUPT packet sent on break (Default) 1 Send INTERRUPT packet on break 17 Break Code The Break Code specifies an eight-bit representation for the break signal condition. Cales may be any number from 1 through 255. Default is 0 (No break code). 18 Network Virtual Terminal (NVT) Option This parameter enables or disables NVT facilities by functional group: 0 NVT disabled (Default) 2 Enables Process Control function * 4 Enables Editing Function * use with caution 19 Initial Keyboard State This defines the initial state of the terminal keyboard at the beginning of a virtual call. Lock the keybaord if the Host sends a header at the beginning of a virtual call. Leave the keybaord unlocked if the Host expects an initial character from the terminal: 0 Keyboard initially locked (Default) 1 Keyboard initially unlocked 20 Half/Full Duplex This parameter specifies the echoing requirement of the terminal. Values are: 0 Full duplex terminal 1 Half duplex terminal 21 Real Character Code This parameter specifies the communications code for representing data generated or recognized by the terminal. Values are: 0 ASCII 1 Correspondence (standard Selectric) 2 EBCD 3 APL ASCII (typewriter-paired) 4 APL ASCII (bit-paired) 5 APL Correspondence 6 APL EBCD 22 Printer Style This identifies the class of printing mechanism used by the terminal: 0 Typewriter style terminal 1 Line printer style terminal 23 Terminal Type This identifies the specific make and model of the terminal. Values are: 0 Unknown or Synchronous Host 1-126 Terminal codes 127 Asynchronous Hosts 24 Permanent Terminal This determines whether the netwirk queriers for a terminal identifier or employs a pre-set identifier. Values are: 0 Request identifier (Default) 1 Use pre-set identifier 25 Manual/Automatic Connection This parameter specifies whether a pre-defined virtual circuit is to be established automatically for the terminal, or it the call must be initiated by a C(onnect) or ID command entered from the terminal. Values are: 0 Manual (Connect or ID required) (Default) 1 Automatic (Address pre-defined) 26 Rate This paramter specifies the transmission speed of the terminal, as determined by the network: 0 110 bps 1 134.5 2 300 3 1200 4 600 5 75 6 150 7 1800 8 200 9 100 10 50 11 ?? 12 2400 27 Delete Character This specifies the character to be used for single-character editing. 0 Function disabled 1-127 Identifies the character to be used Default is decimal 127. 28 Cancel Character Specifies the character to be used to delete input data buffered for the terminal at the PAD. 0 Function disabled 1-127 Identifies the character to be used Default is decimal 24. 29 Display Character Specifies the character to be used for displaying data which has been accumulated by the PAD. 0 Function disabled 1-127 Identifies the character to be used Default is decimal 18. 30 Abort Character Specifies the character which when recevied from the terminal, causes the Host to run the user's process to completion without sending any further output to the terminal. Note: Use with caution. 0 Function disabled (Default) 1-127 Identifies the character to be used 31 Interrupt Character Specifies the character to be used to signal the Host to suspend, interrupt, abort, or terminate the operation of the user's current process. Note: Use with caution. Values are: 0 Function disabled (Default) 1-127 Identifies the character to be used 32 Automatic Hang Up This specifies whether the terminal is to be physically disconnected from the network or left in Command Mode at the end of a virtual call. Note: Use with caution. Values are: 0 Leave in Command Mode upon disconnect (Default) 1 Hang up upon disconnect 33 Flush Output This parameter controls the transmission of all data from the Host to the terminal: 0 Transmit all information sent from (Default) the Host to the terminal 1 Discard all information sent from the Host to the terminal 34 Transmit on Timers This specifies that characters accumulated by the network are forwarded upon epiration of either the Idle or Interval Timer. Values are: 0 Disable transmission on timers 1 Enable transmission on timers (Default) 35 Idle Timer The Idle timer defines the time interval between chracters arriving from the terminal which, when exceeded, causes the network to transmit any accumulated characters to the Host. Values are: 0 Timer disabled 2-255 multiples of 50 ms (.05 seconds) Note: Default is 80 (4 seconds) 36 Interval Timer The Interval Timer specifies the maximum time period during which the network PAD will acuumulate characters before forwarding them to their destination. Values are: 0 Timer disabled (Default) 2-255 multiples of 50 ms (.05 seconds) 37 Network Usage Display This controls the transmission of information on chargeable network usage provided at the end of a virtual call. Values are: 0 Exclude network-generated usage information from the DISCONNECTED message (Default) 1 Include network-generated usage information from the DISCONNECTED message 38 Carriage Return Padding The Carriage Return Padding paramter specifies the number of pad character times to be inserted after each carriage return character sent to the terminal. Parameter 38 specifies the Viable Component. Values may run from 0 through 7. 39 Padding Options This paramter specifies whether or not the network provides time delay padding after form effectors sent to the terminal. Values are: 0 Network provides no time delay padding 1 Network provides time delay padding (Default) after CR, LF, and HT characters 40 Insert on Break This specifies whether or not the PAD inserts the Break Code in the data stream at the point at which the break signal is received from the terminal. Values are: 0 Do not insert on break (Default) 1 Insert Break Code on break 41 DCE-to-DTE Flow Control This parameter specifies network XON/XOFF control of transmission from the terminal. Values are: 0 No DCE-to-DTE flow control (Default) 1 Network provides flow control 42 DCE-to-DTE XON Character This identifies the character which, when sent from the network to the terminal, causes the terminal to resume transmission of buffered data. Value may be any character from 1 to 127. Default is 17 (19 octal, 11 hex). 43 DCE-to-DTE XOFF Character This identifies the character which, when sent from the network to the terminal, causes the terminal to temporarily suspend transmission of buffered data. Value may be any character from 1 to 127. Default is 19 (21 octal, 13 hex). 44 Generate Break This parameter is used to cause a break signal to be transmitted from the PAD to the terminal. It is no longer valid to set this parameter. 45 APP on Break This paramter specifies whether or not the PAD transmits a SET & READ PARAMETERS PAD Message to the Host system when a break signal is received from the terminal. The SET & READ PARAMETERS PAD Message is a translation of an APP TIU command defined by the Telenet Host Interface specification, which was used by packet-mode DTE prior to the adoption of CCITT recommendations for packet-mode DTE. Thus, GTE Telenet strongly advises against the use of the parameter by X.25 DTE. Values are: 0 No SET & READ PARAMETERS PAD Message (Default) generated on break 1 SET & READ PARAMETERS PAD Message generated on break 46 Input Unlock Option This parameter specifies what action the PAD takes after the termuinal user has entered a line of data, the keyboard has been locked, and the PAD has no data to deliver to the terminal. Values are: 0 Unlock based on timer expiration (Default) 1 Unlock based on input data content 47 Input Unlock Timer This specifies the time interval that the PAD will wait before unlocking the terminal keybopard, if the PAD has no data pending delivery to the terminal and paramter 46 is set to 0. Values range from 0 through 255 multiples of 50 ms (.05 seconds). Default is 0 seconds. 48 Input Unlock Character This specifies the character which, when appearing at the beginning of a data line, will cause the PAD to leave the keyboard locked at the end of the data line (if there is no data pending delivery to the terminal). Value may be any character code from 0 through 127; or 240, which leaves the keyboard locked adter all characters. Default is 0. 49 Output Lock Option This specifies the action the PAD will take when it recives data for delivery to the terminal, when the keyboard is unlicked for input from the terminal. Values are: 0 Discard output data 1 Transmit output after input completion 2 Transmit output id input idle (Default) 50 Output Lock Timer This defines the intercal between characters arriving from the terminal which, when exceeded, causes the PAD to lock the keyboard when it has output pending delivery to the terminal. Values may range from 0 through 255 multiples of 50 ms (.05 seconds). Default is 10 (500ms). 51 Output Lock Option This parameter specifies what action the PAD takes after it has transmitted all pending data to the terminal. Values are: 0 Unlock based on timer (Default) 1 Unlock based on output completion 2 Unlock based on output data content 53 Break Options This allows for a combination of options for handling break signals from the terminal. Values may be OR-ed together: 0 No options selected (Default) 1 Interrupt on break 4 APP on break 32 Insert on break 54 DTE-to-DCE Flow Control This parameter specifies XON/XOFF control of transmission from the network. Values are: 0 No DTE-to-DCE flow control (Default) 1 Network respects flow control 55 DTE-to-DCE XON Character This identifies the character which, when sent to the network, causes the network to resume the transmission of buffered data. Value may be any character code from 1 through 127. Default is 17 decimal. 56 DTE-to-DCE XOFF Character This identifies the character which, when sent to the network, causes the network to temporairly suspend the transmission of buffered data. Value may be any character code from 1 through 127. Default is 19. 57 Connection Mode This parameter specifies which level of terminal code conversion the PAD is to perform during Data transfer mode. Values are: 0 Transparent 1 Real 2 Virtual (Default) 58 Connection Escape This parameter specifies whether or not the terminal may escape from Data Transfer mode to Network Command mode. Values are: 0 Escape not possible 1 Escape possible (Default) 59 Flush Output on Break This paramter specifies whether or not the PAD transmits a SET & READ PARAMETER PAD Message to the Host and begins discarding output to the terminal when a break signal is received from the terminal. Again, GTE Telenet recommends that this parameter not be used by X.25 DTE. 0 No SET & READ PARAMETERS PAD Message (Default) sent and no output flushed 1 SET & READ PARAMETERS PAD Message sent and output to the terminal 63 Eight-bit Transparency This paramter identifies whether the terminal uses the eight (most significant) bit for data or as a parity bit. Values are: 0 No parity, eight-bit transparency 1 Parity required (Default) 64 Early ACK This parameter specifies whether or not the PAD for termninal support should acknowledge data packets received for the terminal prior to transmitting the packets (in the form of a character stream) to the terminal. Values are: 0 Acknowledge data packets after transmission to the terminal (Default) 1-7 Acknowledge data packets 1-7 packets prior to transmission to the terminal Note: *Extreme Caution* should be excercised when modifying this parameter. The increased "artificial window" size does not guarantee packet delivery to the terminal. Large amounts of data could be lost from any form of network disconnect. Values of 5 or greater should never be used.